These gauges are ideal for measurement of very low pressure or vacuum normally Air or Gas and measuring media should not be corrosive to brass & phosphor bronze material. Available in dial size 63, 100 and 150 mm with choice of mounting and connection M.S. case or cast aluminium weatherproof case. Accuracy of 63 mm ±3% and 100 and 150 mm ±2% Standard pressure range in mmWC, mbar and inches of water column. Available in ranges from 25 mbar upto 400 mbar. Standard ranges 0 to 25 mbar, 0 to 40 mbar, 0 to 60 mbar, 0 to 100 mbar, 160, 250, 400 bar. Pressure or vacuum other units / scale also available.